Journal
POLYMER DEGRADATION AND STABILITY
Volume 97, Issue 8, Pages 1527-1533Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymdegradstab.2012.04.016
Keywords
Phenol formaldehyde; Pyrolysis mechanism; Fourier transform infrared spectroscopy; Pyrolysis gas chromatography mass spectrometry
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Funding
- National Natural Science Foundation of China [20874011]
- Science and Technology Planning Project of Hunan Province [2011FJ2009]
- Educational Commission of Hunan Province [11C0382]
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Fourier transform infrared spectroscopy was used to characterize the structure of phenol formaldehyde (PF) resin pyrolyzed at different temperatures, and pyrolysis gas chromatography mass spectrometry was used to observe the volatiles. A pyrolysis mechanism has been consequently deduced, and several previous ambiguities have been clarified. The occurrence of carbon monoxide and carbon dioxide is attributed to the oxidization of methylene. However, not oxidization, but methylene scission is mainly responsible for the decomposition of PF resin. At the same time, methylene radicals combine with other small molecules and form some volatiles such as ethylene and methanol. With the elevation of heat treatment temperature, PF resin is progressively transformed into amorphous carbon by pyrolysis and polycyclic reactions. Crown Copyright (C) 2012 Published by Elsevier Ltd. All rights reserved.
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